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Patented Peb. 24, 1885..

(No Modem W. SCOTT. GHROMATI PRINTING MACHINE.

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(No Model.) 2 sheets-sheet. 2. W. SCOTT.

CHROMATIG PRINTING'MAGHINE.

No. 312,769. Patented Peb. 24.1385.

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has been entirely printed the grippers e are NTTED STATES EETCE.

PATENT fl cHRoMATlc-PRINTING MACHINE.

SPECIFICATIQN forming part of Letters Patent No. 312,769, dated February24, 1885.

Application lcd December 28, 1883.

To @ZZ whom, it 77th/,y concern;

Be it known that I, WALTER SCOTT, of Plainfield, in the county of Unionand State of New Jersey, have invented an Improvement in GhromaticPrinting Machines, of which the following is a specification.

My press is adapted to printing two or more colors upon one sheet, or toprinting two or more separateimpressions each rotation of theprinting-cylinder, and to wetting the printing-surface before the inkingoperation, as in lithographie or zincographic printing.

In the drawings, Figure l is a vertical section yof the operative partsof the press. Fig. 2 illustrates the gearing that may be made use of ingiving motion to the parts. Fig. 3 is a partial plan View indicating thepositions in which the respective parts may stand in rela-` tion to theform-cylinder and frame.

rIhe form-cylinder A is continuously revolved, and it may have two,three, ormore printing 'surfaces or forms. I have shown three forms, a bc. These may be types, stereotypes, zinc plates, or lithographie stones,or any other form of printing-surface.

B is the impression-cylinder, of ordinary character, and it isof a sizeto revolve once for each printing-surface, and D is a second or deliverycylinder. If a web of paper is printed from, it `may be supplied to thiscylinder B or delivered in any suitable manner but my press is speciallyadapt-ed to use with sheets fed by hand from the feed-board (Z to thegrippers e, the sheets being taken away and laid upon the table E. Iftwo or more impressions are made upon each sheet, the grippers cwillretain the sheet during the two or three revolutions of theimpression-cylinder, and when the sheet opened by any suitable automaticmeans at the time the grippers f of the delivery-eylinderD are closedupon the advancing end of such sheet, whereby the sheet will be takenoff the impression-cylinder B, and the grippers e will take a freshsheet from the feed-board while the printed sheet is being carried tothe delivery-apparatus, hereinafter described.

For lithographie or zincographic printing,

I make use of a water-trough, H, with atrain of rollers, h h2 h3 h4 h5,of absorbent material, to wet the printingsurfaces that pass beneath l(No model.)

them. With stereotypes' or types these wetting-rollers will not beneeded.

I provide as many ink-troughs as thereare separate colors or inks to beused. I have shown three ink-troughs, L N O. The inking-rollers Zreceive theirink from the rollers Z2 Z3 Z*, duetor Z, andfountain-roller Z6. The other inking-rollers and intermediate rollersare ingroups similarly arranged, one group for each ink-trough. Eachgroup of rollersis in its end frames, the rollers Z Z2 Z3 Z* being inthe frames Zio o2 o3 o* in the frames o8, and n. n2, n3, and n* in theframes of. Said frames Z8 nsoS are guided in slides or supports on theinner surfaces of the frames F, and provided with arms Z", ng, and o,respectively, that extend radially toward the shaft A ofthe-form-cylinder, and are provided with rollers, against which the camsZ, nl, and 01" on the shaft A act, respectively, so as to press theframes and rollers away from the printing-surfaces except when theproper surface to receive the given color is passing beneath theinking-rollers. If the printing-surface a is to give a blue impression,there will be blue ink in the inktrough L, and the c'aln Z will allowthe roll, ers Z Z' Z to run in contact with the surface a and lift therollers Z out of contact with the surfaces b and c as they pass. So,likewise, the surface b will be inked with the black or colored ink fromthe trough N and rollers at', and said rollers n will be moved out ofcon! tact with the surfaces a and c by the cam nl".

The surface c will be inked by the rollers 0,

and such rollers will be moved out of contact with the surfaces c and bby the cani'o. In all instances springs are to be used to press theframes and rollers toward the surfaces to be inked, or vice versa; orcams may be used without springs. It will now be understood that theimpressioncylinder can receive one sheet each revolution, and that onesheet will be printed on the surface a, the next on the surface b, andthethird on the surface c; or else the sheet may be retained by thegrippers e and receive three impressions-one from each surface a b c-insuccession. In color-printing this will be a great convenience, as theregister, when once adjusted, must always be perfect.

In order to take the sheet when printed, I

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make use of the ily-frame R, composed of two arms upon the rock-shaft r,such arms being far enough apart to allow the sheet to swing betweenthem as held by the grippers s s.

Upon reference to Fig. 2 it will be seen that the middle inking-rollervand the two adjacent rollers of each group are geared together, as

at 13 14 15, so that all the rollers in each group will be revolvedeither by the gearing or by surfaeecontact, and I apply a gear-wheel,16, upon the edge of the formcylinder or upon its shaft and theintermediate gears, 17, that give motion to the gears 13, and thesegears are placed, as shown, so that the movement of the frames andgroups of rollers toward and from the printing-surfaces will not in anymanner separate the gear-teeth; hence the inkingrollers will continue torevolve, and will be in motion in the proper direction when brought intocontact with the printing-surfaces, and the inking will be perfectinstead of injured, as it would be if the inking-rollers were at restwhen brought into Contact with the moving printingsurfaces.

The ily-frame and grippers for conveying away the printed sheet form thesubject of a separate application filed December 28, 1883,

portions of the form-cylinder without the ro` tation of theinking-rollers being stopped, substantially as set forth.

Signed by me this 20th day of December, A. D. 1883.

WALTER soorr.

Vitnesses:

GEO. T. PINCKNEY, WILLIAM G. Morr.

